What do you like doing和what kind of books do you like to do怎样理解?

题目

What do you like doing和what kind of books do you like to do怎样理解?
为什么一个要用进行时一个不用进行时?

答案

第一句并不是进行时,like 后的 doing 只是一个动名词的成分.固定的这样.也可以说,What do you like to do.
就比如 What do you enjoy doing与What do you enjoy to do?